package com.bite.judge.test.t;


public class Solution {
    public int sum(int num1, int num2) {
        return num1 + num2;
    }

    public String concatenate(String a, String b) {
        int i = 0;
        while(i != -1) {
            i++;
        }
        return a + b;
    }

    public String toUpperCase(String s) {
        return s.toUpperCase();
    }
}
